Bought 3 unit Joven water heater, 2 units are i88P(RS) and one is i30LP. Yesterday technician come to install, one i88P once turn on heater RCCB trip. Tested internal short on live & neutral wiring. WTF, did they even test it before ship out the unit?? Now have to call Joven service center come to repair.

i30LP not come with rain shower. Only i88P wih rain shower. Around RM550 if not mistaken.
Another thing is the booster pump is noisier than i expected. Compare to my Panasonic DH-3KP2M, the water pressure is more or less same but Joven is alot noisier despite the 'silent plus' slogan.

Anyway, if you want rain shower make sure the water pressure is high enough, or else useless at all. My case i expect too much on the built in pump now even with pump the water pressure is not enough, so i plan to install pump at the tank output, but will make my built in booster pump useless, which waste of money.

This is unexpected. Such important device which will cause electric shock if not properly installed is not 100% checked before shipment, i found this is totally unacceptable.

Yalo, dun know about this ma, 1st time own a house, now after bought only know built in pump is useless.

Actually the pump is just restore the pressure loss in the heater and internal path. heater with pump output = output without heater.

Ur house dun have ON-OFF switch for heater? By right it should have 1 plug inside the bathroom and i switch outside the bathroom.

This post has been edited by coolkwc: Jan 1 2016, 01:11 PM

lol...The switch is made to lit when turn ON.

Just to share.

10 years, 2 Joven booster pump heater (one was DC, recently AC pump) failed, so i decided to move out from Joven brand and install a Panasonic DH-3NDP1MS last week, no regret on it so far. Bought at Shopee for RM650.

I install the heater myself, compare the internal built with Joven, i'm very surprise Panasonic at the similar price gave a much robust and better quality built, copper heater tank, silent DC pump, and the old school but trusted push rod ELCB. Furthermore the Panasonic model come with digital LCD and temp control, means if you set 37'C, it will auto regulate the water temp at 37'C based on different water flow as long as it is stay within 3600W max power (can see the bar that indicate power level), so you won't get sudden hot water when someone open tap water in another room causing water pressure to drop, or no need to adjust the water temp during noon and night due to different inlet water temp.

The Joven AC pump model that failed recently (temperature control failure, always stuck at max temp), upon open up a thick layer of black carbon powder from the AC pump carbon brush scattered all over the place inside the casing and board, this is extremely danagerous as the carbon dust is conductive, this show how poor the Joven engineer design in terms of safety aspect of the heater.

I think Panasonic latest design is catch up with what Joven/Rinnai/Alpha offer in terms of appearance, i don't think i will go back to any non Panasonic water heater in near future.

This post has been edited by coolkwc: Mar 25 2025, 11:13 PM

I have this model (non rain shower), forget about the built in pump from water heater, be it AC or DC pump, especially DC pump is slightly weaker compare to AC pump. You will need a powerful external booster pump if you primarily using rain shower. I do have a 0.5Hp booster pump installed with aftermarket rain shower pair with the Panasonic heater.