MDC ROBSON XTT - Troubleshooting

www.mdcusa.com Ph: 833 632 8721
66
Problem Potential Cause Resolution
No hot water at
the faucet
Gas supply is turned off or
interrupted.
Check and/or turn on gas supply.
Gas tank is empty Rell/replace the gas tank.
The appliance is switched off. Switch on the appliance according to instructions (refer to
“Operating procedures” on page 50).
Fresh water supply is turned off. Open the fresh water supply.
Power supply to the appliance is
switched off.
Switch on power supply to the appliance.
Defect in the appliance. LED 2 ashes red (refer to “APPENDIX A - Error Codes” on
page 64) and contact a certied service technician if
necessary.
Boiling noises Too much lime scale in the AquaGo
instant water heater.
The appliance must be decalcied (refer to “Decalication”
on page 58).
Hot water
temperature too
low
Gas ow to the appliance is too
low (gas inlet pressure < 10.5 in.
wc).
Consult vehicle documentation to determine if the gas
supply is capable of providing the necessary volume of gas
for the appliance.
Contact a service technician to verify that the gas installation
is suitable
Volume ow of hot water is too
high and/or temperature of cold
water reaching the appliance is
too low
Turn down hot water at the faucet or in the shower in order
to reduce ow rate.
Potentially retrot a ow rate throttle in the water system.
This must be performed by a certied service technician.
Too much lime scale in the
appliance.
The appliance must be decalcied (refer to “Decalcication”
on page 58).
Water escaping
at pressure relief
valve.
Water pressure in water system
too high
Adjust the water pump pressure to a maximum of 65 psi (4.5
bar). If the water system is connected to a central water
supply higher than 65 psi (4.5 bar) (rural or urban
connection), a pressure reducer must be used.
Install a pressure reducer (e.g. Truma pressure reducer) at the
fresh water supply.
Water cannot expand in the water
system.
Contact the vehicle manufacturer about retrotting a pres-
sure compensation element.
Lime or dirt under the pressure
relief valve seat.
Allow the appliance to cool and then slowly raise the test
lever (Fig. 3 – 4a) to ush the water system and attempt to
force dirt or foreign matter out of the pressure relief valve
seat.
Replace pressure relief valve. This must be performed by a
Truma certied service technician.
Water escaping at
water inlet lter
Lime or dirt under the O-ring
seats.
Clean the O-rings and their corresponding sealing
surfaces with clean water.
Troubleshooting